Lanthanide Podates with Programmed Intermolecular Interactions: Luminescence Enhancement through Association with Cyclodextrins and Unusually Large Relaxivity of the Gadolinium Self-Aggregates
作者:Nicolas Fatin-Rouge、Éva Tóth、Didier Perret、Robin H. Backer、André E. Merbach、Jean-Claude G. Bünzli
DOI:10.1021/ja001089b
日期:2000.11.1
The synthesis of the phenyl anchored podand H4L1 fitted with four 3-carboxylate pyrazole arms and programmed for intermolecular interactions is reported, and its protonation constants are determined. Interaction with Ln3+ ions (Ln = La, Eu, Lu) in dilute aqueous solutions leads to complexes with 1:1 and 1:2 metal−ligand stoichiometry. The stability constants are in the range log β110 = 12.7−13.5 and